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Census tracts are small, relatively permanent statistical subdivisions of a county or equivalent entity, and are reviewed and updated by local participants prior to each decennial census as part of the Census Bureau\u2019s Participant Statistical Areas Program (PSAP). The Census Bureau updates census tracts in situations where no local participant existed or where local or tribal governments declined to participate. The primary purpose of census tracts is to provide a stable set of geographic units for the presentation of decennial census data. Census tracts generally have a population size between 1,200 and 8,000 people with an optimum size of 4,000 people. The spatial size of census tracts varies widely depending on the density of settlement. Ideally, census tract boundaries remain stable over time to facilitate statistical comparisons from census to census. However, physical changes in street patterns caused by highway construction, new development, and so forth, may require boundary revisions. In addition, significant changes in population may result in splitting or combining census tracts. Census tract boundaries generally follow visible and identifiable features. They may follow legal boundaries such as minor civil division (MCD) or incorporated place boundaries in some states to allow for census tract-to-governmental unit relationships where the governmental boundaries tend to remain unchanged between censuses. State and county boundaries always are census tract boundaries in the standard census geographic hierarchy. In a few rare instances, a census tract may consist of noncontiguous areas. These noncontiguous areas may occur where the census tracts are coextensive with all or parts of legal entities that are themselves noncontiguous. Census Tract Codes and Numbers\u2014Census tract numbers have up to a 4-character basic number and may have an optional 2-character suffix; for example, 1457.02. The census tract numbers (used as names) eliminate any leading zeroes and append a suffix only if required. The 6-character numeric census tract codes, however, include leading zeroes and have an implied decimal point for the suffix. Census tract codes range from 000100 to 998999 and are unique within a county or equivalent area.<\/SPAN><\/SPAN><\/P>

The 2021 TIGER Geodatabases are extracts of selected nation-based and state-based geographic and cartographic information from the U.S. Census Bureau's Master Address File/Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) database. The geodatabases include feature class layers of information for the fifty states, the District of Columbia, Puerto Rico, and the Island areas (American Samoa, the Commonwealth of the Northern Mariana Islands, Guam, and the United States Virgin Islands). The geodatabases do not contain any sensitive data. The 2021 TIGER Geodatabases are designed for use with Esri\u2019s ArcGIS. However, other GIS software such as Quantum Geographic Information System (QGIS) also support the geodatabase format.<\/SPAN><\/SPAN><\/P>

Please refer to the 2021 TIGER/Line Shapefile Technical Documentation for additional information including definitions and metadata. Questions about these files please email Geo.geography@census.gov or call (301) 763-1128.<\/SPAN><\/SPAN><\/P>

Legal Disclaimer: No warranty, expressed or implied, is made with regard to the accuracy of the data in the TIGER Geodatabases, and no liability is assumed by the United States Government in general, or the Census Bureau specifically, as to the positional or attribute accuracy of the data. The boundary information in the TIGER Geodatabases is for statistical data collection and tabulation purposes only. Their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.<\/SPAN><\/P><\/DIV>", "summary": "This is the official US Census Bureau 2020 Census Tracts", "title": "WHADMIN.CensusTract", "tags": [ "US Census", "Census Tract" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 625000, "maxScale": 5000, "spatialReference": "", "accessInformation": "US Census Bureau", "licenseInfo": "" }